Documentary maker Jan Thompson looks at U.S. soldiers who were interned in Japanese concentration camps during World War II. Drawn extensively from first-hand sources (present-day interviews, diaries and comic strips written inside the camps), this often feels like a personal reminiscence more than a straightforward history lesson, yet it’s still highly informative, recounting in precise detail the Japanese army’s barbarous practices and the prisoners’ day-to-day existence inside the camps. Some of the material feels extraneous—there’s a lengthy section about prisoners writing cookbooks to deal with their hunger—but on the whole this shares an essential history.